Ignition system circuit



Nov. 23, 1965 w. CLAUNCH IGNITION SYSTEM CIRCUIT 4 Sheets-Sheet 1 FiledDec. 8, 1961 F/GZ INVENTOR. MARSHALL W. CLA UNCH ATTORNEY Nov. 23, 1965M. w. CLAUNCH 3,219,879

IGNITION SYSTEM CIRCUIT Filed Dec. 8, 1961 4 Sheets-Sheet 2 INVENTOR.

M. W.CLAUNCH Y ATTORNEY 4 Sheets-Sheet 3 Aw) H i v Q N nah "3 amp n: hmm Q M. W. CLAUNCH IGNITION SYSTEM CIRCUIT mm mow 12 mm mmw om mow Nov.23, 1965 Filed Dec. 8, 1961 INVENTOR.

ATTORNEY M. WCLA UNCH v GE Nov. 23, 1965 w. CLAUNCH 3,219,879

IGNITION SYSTEM CIRCUIT Filed Dec. 8. 1961 4 Sheets-Sheet 4 m2 67,. 52 EF IG. 5

M.W.CLAUNCH INV EN TOR.

[8 BY W A TTORNEY United States Patent 3,219,879 IGNITION SYSTEM CIRCUITMarshall Wilson Claunch, Borger, Tex., assignor to C. Paul Henson,Amarillo, Tex. Filed Dec. 8, 1961, Ser. No. 158,083 6 Claims. (Cl.315-218) This invention relates to an electrical apparatus and, moreparticularly, to a magneto for use in an ignition system adapted formulticylinder internal combustion engines and the like.

According to this invention, one magneto may supply any number of pointsup to the maximum number of distributor cams in that magneto structureat any desired voltage up to the maximum am-Peres output provided bythat machine. Additionally, according to this invention, as greatervoltages or capacities are required other similar sources of may beconnected in parallel therein to provide any desired current or voltageacross any desired number of points.

This device and system provides a relatively complete range of modernindustrial ignition system supply for an internal combustion enginemotor with a minimum of inventory and a minimum of time necessary toadapt a magneto to any of the services desired therefrom. The magnetodevice also provides a switchover from one system to another; thismagneto is designed so that no special tools are required for suchchanges.

It is one object of this invention to provide a magneto adaptable foruse for engines having a varied number of cylinders.

It is a further object of this invention to provide a magneto allowingactuation of the spark plugs for a variety of multicylinder engines witha minimum of inventory.

It is a further object of this invention to provide one magneto machinewihch may be used in a relatively complete range of modern industrialignition systems.

It is yet another object of this invention to provide a novel ignitionsystem adaptable for four, six, eight, ten, or twelve cylinder engines.

The above and further objects and novel features of the invention willmore fully appear from the detailed description provided in thespecification hereinbelow, of which specification the drawings attachedhereto form a part and wherein same numbers refer to the same parts inall the drawings and wherein:

FIGURE 1 is a diagrammatic phantom view of the major mechanical elementsof a magneto of this invention, shown broken away in part, and inperspective;

FIGURE 2 is a diagrammatic showing of the magneto of FIGURE 1 incombination with the engine with which used;

FIGURE 3 is a diagrammatic wiring diagram of a magneto according to thisinvention for a magnetic ignition system according to this invention forusing either six or twelve spark plugs and for using either one or twoE.M.F. sources;

FIGURE 4 is a diagrammatic wiring diagram of a magneto according to thisinvention for magneto ignition of either four, six, eight, ten, ortwelve spark plugs using the double source shown in FIGURE 3;

FIGURE 5 shows a magneto according to this invention wherein a singlesource of and one distributor camshaft provide for actuation of four,six, eight, ten, or twelve spark plugs.

FIGURES 1, 2 and 3 show a preferred embodiment of this invention. Allfigures show the connections for actuation of six spark plugs (718-768).

A magneto, 10, according to this invention, comprises a distributorsection 11 and a magneto section 12, used with an internal combustionengine 13.

3,219,879 Patented Nov. 23, 1965 The magneto comprises a casing 10 witha chamber 10' therein. A distributor camshaft 19 is located therein andprovided with a plurality of cams 51-62 thereon. The camshaft serves toactuate a plurality of pairs of contact points 71P-82P for each of saidcams 51-62 respectively. Each of a set of contact arms 71A-82A are eachpivotally attached to said casing and supports one movable member ofeach of said pair of points. The movement of each said arm on each saidrespective cam permits said movable and fixed points to etfectelectrical contact across said cam in a controlled sequence and providethe conventional firing order sequence for combustion in the cylindersof engine 13.

A main breaker cam 20 is located in said casing. Its motion iscontrolled through a gear train, as 23, which also controls the motionof said distributor camshaft. Breaker cam points 28 and 29 are opened bysaid breaker cam.

A source of electromotive force 17 is actuated by a drive shaft 67 whichalso actuates said gear train. The E.M.F. source comrpises a magnet 14connected to and rotated by said drive shaft 67 and a coil 17 with acore having pole shoes 15 and 16 in electromagnetic relationship withsaid rotating magnet. A condenser 116 is connected from one end of saidsource of electromotive force across breaker points 28 and 29 to theother side of said breaker cam points, said breaker cam and said sourceof electromotive force thus being connected in series between wires 26and 118 and condensers 116 and 117 are connected in parallelthereacross. The supplementary breaker contact points 121 and 122 areconnected in series with E.M.F. source 97 across Wires 46 and 118.Condensers 119 and 120 are in parallel between wires 46 and 118.Condensers 116 and 117 provide a sufficient capacitance to substantiallycompletely prevent sparking across said breaker cam points during thenormal operational speed of said shaft 67 down to r.p.m. i.e., of itsnormal operating speedabout 1200 r.p.m.-while providing completesparking across all of the spark plug points 718-768 in the l-6 positionof switch 100 shown in FIG- URES 1 and 3. One point of each of saidpairs of distributor contact points 71P-82P is also connected to thecommon conductor 118 and then through said conductor 118 to a ground 18.

The one end of said source of electromotive force 17 is connected byoutput conductor wire 26 to one end of the primary coils of each of aplurality of transformers, as 31-36 or 37-42 or 31-42 as belowdescribed.

The other end of each of said transformer primaries is connected to theend of the contact arms, as 71A-82A, pivotally fixed to the casing anddistant from the corresponding distributor movable contact point locatedon the opposite side of the distributor cam. In each of saidtransformers the secondary coils are connected at one of their ends toground and at the other end across a spark plug, as 718-765 or 778-828or 718-828, as below described. In the embodiment shown in FIGURE 1there are 12 distributor cams on the shaft 19 in casing 11. As shown inFIGURE 3, there are 12 distributor cam arms and 12 sets of points insaid casing. The rotatable switch means 100 is connected at one end tooutput wire 26 and at its other end to common conductor 118 through acondenser 116. Switch 100, in position shown in FIG- URE 3, provides forconnection of an increased condenser capacity across lines 26 and 118 onremoval of connection between the source and transformers 37-42. Thisincrease of the condenser capacity is of a quantity generally inverselyproportional to the number of transformers remaining connected acrosssaid source of The breaker cam 20 closes the circuit across each of theprimary coils of each of the transformers following the closing of thepairs of corresponding distributor cam points. The breaker cam opens andthereby interrupts the current through each of said transformers whileeach corresponding pair of distributor cam points is closed. Thedistributor camshaft 19 may be connected to the shaft 21 for the breakercam by a set of gears: thereby the rotation of the breaker cam is amultiple2X in the preferred embodimentof the speed or the r.p.m. of thedistributor camshaft. Where a plurality of sources of are used, as shownin FIGURES 3 and 4, the separate sources of E.M.F., as 17 and 97, eachhave a separate output line, as 26 and 46, respectively, to each of thetransformers actuated by each of said sources of As shown in FIGURE 4, anumber of transformers may be cut out by rotatable switch means 130, ascontrolled by handle 129 and indicator 128, from the circuit and permitthat 4, 6, 8, 10, or 12 of the transformers and corresponding sparkplugs may be actuated by the plurality of sources of When such change ismade, additional capacity 147-149 is connected by switch 130 from theoutput wire line of each source of to 118 as the number of primary coilsof the transformers, as 31 to 42, connected thereacross are decreased.The increase and decrease of capacity is in the range which develops thevoltage across each of the points of the spark plugs of each of thetransformers so that they all operate in the range from to 200% of thenormal operating speed of the distributor camshaft without missing.

The magneto section 12 contains, in the preferred embodiment, afour-pole rotating magnet 14 which rotates in magnetic proximity to aset of laminated pole shoes 15 and 16 of the coil core. The core isprovided with a primary coil 17, one end of which coil is grounded atone point 18 through a set of contact points 28 and 29 that areregularly opened and closed. The camshaft 19 and the rotating magnet 14are driven by a gear train 23, of which one gear 64 is actuated by thecrank shaft 30 of the motor 13 wherein the combustion occurs, and whichcombustion is initiated by the sparks developed by magneto 10. Gear 64drives shaft 67.

The magneto 10 forms and discharges pulses of low (50-100 v.) voltagealong output wire 26 (and 46, as below described) to transformers 31-42whereat such low voltage is transformed to higher (IO-40,000 v.)voltages needed for ignition of internal combustion engines. Such lowvoltage transmission lowers corona losses and insulation requirements.

Transformers of similar electrical characteristics, as 31-42, arelocated adjacent each of the spark plugs for each of the internalcombustion engine cylinders, as 31'-36', of the internal combustionengine 13 to provide, from the pulses of low voltage current alongoutput wires 26 and/ or 46, pulses of sufliciently high electricalenergy to form sparks across the gaps of the spark plugs adequate toproduce ignition in the cylinders of the internal combustion engine 13.

The timing shaft 19 is provided in the distributor section with a seriesof cams, as 51-62, as shown in FIG- URES 3 and 4 and, as 51-62, as shownin FIGURE 1. Each of these cams is firmly attached to the distributorcamshaft: the shaft and cams thus serve to controllably completeelectrical circuits through actuation of contact arms 71A-82A,respectively, via pairs of points, as 71P- 82P, respectively and socontrol the firing order for the spark plugs, as 718-828, via a mainbreaker cam as below described. The number of distributor cams on thedistributor camshaft and their time relationship to each other may be,as below described, changed as needed in view of the number of sparkplugs and cylinders to be actuated to permit either four, six, eight,ten, or twelve spark plugs to be actuated by this apparatus.

Main breaker cam 20 may be fixedly located on the distributor camshaft19, as shown in FIGURE .3, or the main breaker cam 20 may be provided,as shown in FIGURE 1, with a separate camshaft 21 driven by a gear 22.Gear 22 is driven by gear train 49, one gear of which, 48, is mounted onand fixed to shaft 19. Both arrangements may provide the below describeddesired time relations of the movement of the breaker cam and thedistributor cams. In the preferred embodiment, the arrangement is asshown in FIGURE 3 with the main breaker cam and the distributor camsattached to the same shaft. Distributor camshafts with differing campositions to match the contour of the engine 13, crankshaft 30 and theresulting firing order of the cylinders may be substituted for shaft 19.

In the embodiment shown in FIGURES 1-3 all the distributor cams, as51-62, are located on the same camshaft 19 and that one camshaft isconnected to the rotating magnet 14 by gear train 23. Gear 64 thereof isdriven by the motor crank shaft 30; gear 64 drives magnet 14 and gear65; the latter gear drives gear 66 which is attached to and drives shaft19.

When the main breaker points are closed, current flows from each primarycoil of the source, as 17, through the breaker cam, to the primary inthe transformer coils as 31, 36, 37, and 42 in FIGURE 3 and throughcontact arms 71A, 76A, 77A, and 82A and through the closed contacts 71P,76P, 77F, and 821 back to the ground 18. The breaker cam 20 is set toclose the breaker points 28 and 29 shortly after the correspondingdistributor cams 51-62 close their corresponding contact points 71-82Prespectively. The main breaker points 28 and 29 are kept closed untilthe magnetic field reaches its densest condition whereupon the breakercam 20 opens the breaker points 28 and 29 and so causes a rapid collapseof the magnetic field in the primary coil 17: the rapid collapse of thisfield generates a pulse of primary current to the primary coils of thetransformers as 31-42; the magnetic field thereby developed in each ofthe corresponding secondary winding of each such transformers produces ahigh voltage current across the ends of each such secondary winding andfires the respective spark plugs as 71S82S. The distributor cams 51-62keep the corresponding distributor contacts 71P-82P closed in propersequence during the collapse of the magnetic field through the core ofthe corresponding transformer, as points 28 and 29 open prior to thedistributor cam opening for each spark plug. 7

Accordingly, the distributor contacts 71P-82P do not open while currentis flowing through those contacts; it

' is only after the current ceases to flow therethrough that suchdistributorcontacts separate.

As shown in FIGURE 3, a plurality of sources 17 and 97 are arranged sothat the amperage developed by each or both such sources isdistributable across either of the pairs of plug gaps 51-56 or 57-63 oracross plugs 51-63. A rotatable gang switch 100 is provided with switchplates 102, 104, 106, 108, and and firmly attached to shaft 112. Thisswitch is shown in FIGURES 1, 2, and 3 in the position for actuating siXspark plugs. This switching arrangement permits actuating transformers31-36 and their corresponding spark plugs 718-768 by one source,comprising coil 17,

when the switch 100 is in the 1-6 position as shown inv FIGURES 1-3.This switch provides for connecting capacitor 116 as Well as condenser117 across wires 26 and 118 and grounds out conductor 46 in the eventthat coil 97 is connected around core 99 in magnetic proximity torotatable magnet 14.

The position of switch 100 is indicated by an indicator as 101 on topplate 114 and controlled by a positioning means, as knob 113, alsofirmly attached to shaft 112.

In the position 7-12 of the switch 100 for connection of transformers37-42 and their corresponding plugs 77S- 82S, condenser 119 is connectedacross output wire 46 and 118 as well as condenser 120 and wire 26grounds out.

In the position 1-12 of switch 100, condenser 120 is connected acrosslines 46 and 118 and condenser 117 is connected across lines 26 and 118.With such condensers so connected, the normal operating speed of 1200rpm. will permit a coming in speed of 100 r.p.m., and a smooth operatingof the breaker points, as 28 and 29 and 121 and 122. However, suchcondenser 117 (similar to 119) will not serve alone when only points718-765 or 778-825 are desired to be used with the above apparatus.

Demonstrative experiments evidenced demonstrating the utility of thisinvention is that a magneto such as described in Overhaul InstructionsBendix Industrial Magnetos Type DLC February 1960, pages 3K625-644, butmodified to a wiring circuit as shown in FIGURE 3, such magnetooperating with an output of 3 amps. from the primary coil, as 17, at adrive shaft, 67, speed of 400 rpm. and in which the spark gaps (71S-82S)consistently spark with a drive shaft speed of 100 rpm, permits such amagneto with twelve distributor contact points and a condenser 117 of0.97 mfd. capacity, as shown in FIGURE 3, to operate as a sixdistributor contact point apparatus, as in FIGURES 3 and 1, whencondenser 116 has a 1.2 mfd. capacity without replacement or attentionfor a period of several weeks.

FIGURE 4 is a combination of components in FIG- URE 3, so many of thecomponents shown in some detail in FIGURE 3 are shown onlydiagrammatically in FIG- URE 4. FIGURE 4 is a wiring diagram showing howa second source of E.M.F., as 97, comprising a magnet 98 and coil 99,connected as shown, may be combined with a first such source, comprisingmagnet 14 and source 17 so that any fraction of the output of each orboth sources 17 and 97 may be operated according to this invention. Inpositions A, B, C, D, E, respectively, of handle 129, according to thearrangement shown in FIGURE 4, either four, six, eight, ten or twelvespark plugs may be actuated using two E.M.F. sources. In thiscombination, as the number of transformers and spark plugs supplied byeach E,M,F, source is reduced from the maximum number (six), there is noburning of the points of the spark plugs or the main breaker camsbecause of the additional capacity put into the circuit as shown.Rotatable switch 130 is formed of plates 131- 146. As shown, it providesfor connection of 4-6 of the transformers 31-36 and 4-6 of thetransformer 37-42 and to operate any of said sets of transformers andassociated points 715-768, 778-828 or 718-828 as desired with thefurther provision that additional condenser capacity as 147, 148, 149for use of 4, 8, 6, and points be respectively connected as shown inFIGURE 4 across lines 46 and 118 and across lines 26 and 118 as thenumbers of spark plug gaps supplied by each source of E.M.F.as 17 or97is reduced. The extent of increase of capacity is as above described-i.e., that sufficient additional capacity be added that the breakergaps used (28 and 29 and/or 121 and 122) not spark and the plugs usedall consistently spark at of the normal camshaft speed as well as at thenormal camshaft speed.

FIGURE 5 is a wiring of another magneto according to this inventionwherein there are twelve distributor cams, as 51-62' and spark plugpoints, as 71S-82S' and rotatable gang switch handle 162 rotates switchplates 161 of switch 151 so 4, 6, 8, or 10 of such cams and points maybe used in switch positions A, B, C, or D respectively, as well as E,for the full number (twelve) of such cams and points. As shown in FIGURE5, as the number of spark plug gaps actuated by the source is reduced byswitch 151, the capacity connected as indicated by condensers 162-166 isincreased so that, with substantially the same flux being developed ateach r.p.m. of the rotor 14, the voltage across each spark plug ismaintained substantially constant.

Twelve distributor cams are used on shaft 19, as shown in FIGURE 5, withappropriate contact arms 71-82' actuating the appropriate points71P-82P' and the spark plugs 71S-82S.

In FIGURE 5, there is shown only one distributor camshaft 19' which alsoserves to actuate the breaker cam 20". In another arrangement, such asin FIG. 1, a separate cam and separate drive are used to more rapidlydrive the breaker cam lobe than the cam lobes on the distributorcamshaft. Thereby the shaft for the breaker cam has a higher r.p.m. thanthe rpm. of the distributor camshaft. According to this invention, asshown in FIGURE 5, one magneto may be used in a relatively wide range(4-6-8-10-12 spark plugs) of modern industrial ignition systems up tothe limit of the output of the source; thereabove, the system of FIGURE3 or 4 is used.

FIGURE 3 is a diagrammatic showing of the electrical circuit in amagneto with two separate sources of A magneto of this invention, as inFIGURE 5, may also be provided with additional sources, as shown inFIGURES 3 and 4, to provide increments of as needed through suchmultiplication of the sources of Thus, any multiple of four, six, eight,or ten cylinders can be actuated by the magnetos of this invention withsubstantially any desired total amperage to the transformers therefor,as 31-42, and thus, provide magneto ignition for a relatively completerange of internal combustion engine requirements. Accordingly, thesystem and devices of this invention provide not only for utilizing anydesired number of distributor points, -N, to actuate a number, N, ofspark plugs but also to actuate (a) a number less than N, as in FIGURES5 and 1, and (b) multiple of N spark plugs, as in FIGURES 3 and 4, or(c) any multiple of a number of such plugs less than N, as shown byFIGURES 3 and 5.

Although only a few embodiments of the invention are illustrated in thedrawings and described in detail in the foregoing specification, it isto be expressly understood that the invention is not limited thereto.For example, the basic principles are applicable to systems embodyingother known sources of electrical energy, such as battery vibrator orthe like, and the invention is not limited in its uses to internalcombustion engine systems. Various other changes may also be made,particularly in the design and arrangement of the parts illustratedwithout departing from the spirit and scope of the invention as the samewill now be understood by those skilled in the art.

What is claimed is:

1. An ignition system circuit in which the source of electromotiveenergy is a magneto comprising (a) a casing with a chamber therein,

(b) a rotatable distributor camshaft in said chamber, a gear and aplurality of distributor cams on said shaft,

( l) a pair of contact points for each of said cams,

one fixed, one movable,

(2) a contact arm supporting the movable point and pivotally attached tosaid casing and contracting said fixed contact point across said cam foreach of said cams,

(c) a rotatable main breaker cam,

(1) a pair of main breaker cam points opened and closed by said breakercam,

(d) a source of electromotive force connected in series with saidbreaker cam points, and comprising (1) a magnet connected to and rotatedwith said gear and a coil in electromagnetic relationship with saidrotating magnet,

(e) a condenser connected across said source of electromotive force andacross the breaker cam points, one of each pair of said distributorcontact points being connected to a ground, a first end of said sourceof electromotive force distant from said breaker cam points beingconnected to one end of a primary coil of each of a plurality oftransformers predetermined in number and,

(1) each of said transformers secondary coils being connected at one endto a ground and at the other end across a spark plug,

(2) the other end of each of said transformers primary coil 'beingconnected to the distributor contact point on one of said contact armsdistant from said grounded distributor contact point,

(f) electrically conductive means connected at one end to said first endof said source of and at its other end to said ground through aplurality of condensers increasing and decreasing, respectively, thetotal effective connected capacity of said condensers on removal andaddition of connection between said source of E.M.F. and any of saidtransformers.

2. An apparatus as in claim 1 wherein the quantity of capacity connectedacross said first end of said source of E.M.F. and ground increases anddecreases on removal and addition, respectively, of connection betweensaid source of and said transformers inversely proportional to thenumber of transformers remaining connected across said source of 3.Apparatus as in claim 1 where the electrically conductive means is aswitch means providing that four, six, eight, ten, or twelve of the saidtransformers and corresponding spark plugs may be actuated by the sourceof EMF.

4. An ignition system circuit in which the source of electromotiveenergy is a magneto comprising (a) a casing with a chamber therein (b) arotatable distributor camshaft in said chamber, a gear and a pluralityof distributor cams on said shaft,

(1) a pair of contact points for each of said cams,

one fixed, one movable,

(2) a contact arm supporting the movable point and pivotally attached tosaid casing and contacting said fixed contact point across said cam foreach of said cams,

(c) a pair of main breaker cams on a rotatable shaft, and a pair of mainbreaker cam points opened and closed by each of said main breaker cams,

(d) a plurality of sources of electromotive force, each connected inseries at one end with a pair of said main breaker arm points andactuated by said gear and connected thereto, comprising (1) a pluralityof magnets connected to and rotated by a gear train and a pair of coilsin electromagnetic relationship with a rotating magnet, said gear trainalso driving said distributor l shaft,

(e) a condenser connected across each of said sources of electromotiveforce and across the corresponding breaker cam points in seriestherewith to the other side of said breaker cairn points, one of eachpair of said distributor contact points being connected to a ground, afirst end of each said source of electromotive force distant from saidbreaker cam points in series therewith being connected to one end of aprimary coil of each of a plurality of transformers predetermined innumber and I (1) each of said transformers secondary coils beingconnected at one end to a ground and at the other end across a sparkplug,

(2) the other end of each of said transformers primary coil beingconnected to the distributor contact point on one of said contact armsdistant from said grounded distributor contact point,

(f) electrically conductive means connected at one end to said first endof said source of E,M.F. and at its other end to said ground through aplurality of condensers increasing and decreasing, respectively, thetotal effective connected capacity of said condensers on removal andaddition of connection between said source of and any of saidtransformers.

5. An apparatus as in claim 4 wherein the quantity of capacity connectedacross said first end of said source of and ground increases anddecreases on removal and addition, respectively, of connection betweensaid source of and said transformers inversely proportional to thenumber of transformers remaining connected across said-source of EMF.

6. An apparatus as in claim 5 where the electrically conductive means isa switch between the sources and the ground providing that four, six,eight, ten, or twelve of the transformers and corresponding spark plugsare connected to the sources of References Cited by the Examiner UNITEDSTATES PATENTS 2,378,893 6/1945 Berkey et al 315--209 2,961,580 11/1960Harnden 315209 JOHN W. HUCKERT, Primary Examiner.

ARTHUR GAUSS, JAMES D. KALLAM, R. F. POLIS- SACK, Examiners.

1. AN IGNITION SYSTEM CIRCUIT IN WHICH THE SOURCE OF ELECTROMOTIVEENERGY IS A MAGNETO COMPRISING (A) A CASING WITH A CHAMBER THEREIN, (B)A ROTATABLE DISTRIBUTOR CAMSHAFT IN SAID CHAMBER, A GEAR AND A PLURALITYOF DISTRIBUTOR CAMS ON SAID SHAFT, (1) A PAIR OF CONTACT POINTS FOR EACHOF SAID CAMS, ONE FIXED, ONE MOVABLE, (2) A CONTACT CAM SUPPORTING THEMOVABLE POINT AND PIVOTALLY ATTACHED TO SAID CASING AND CONTRACTING SAIDFIXED CONTACT POINT ACROSS SAID CAM FOR EACH OF SAID CAMS, (C) AROTATABLE MAIN BREAKER CAM, (1) A PAIR OF MAIN BREAKER CAM POINTS OPENEDAND CLOSED BY SAID BREAKER CAM, (D) A SOURCE OF ELECTROMOTIVE FORCECONNECTED IN SERIES WITH SAID BREAKER CAM POINTS, AND COMPRISING (1) AMAGNET CONNECTED TO AND ROTATED WITH SAID GEAR AND A COIL INELECTROMAGNETIC RELATIONSHIP WITH SAID ROTATING MAGNET, (E) A CONDENSERCONNECTED ACROSS SAID SOURCE OF ELECTROMOTIVE FORCE AND ACROSS THEBREAKER CAM POINTS, ONE OF EACH PAIR OF SAID DISTRIBUTOR CONTACT POINTSBEING CONNECTED TO A GROUND, A FIRST END OF SAID SOURCE OF ELECTROMOTIVEFORCE DISTANT FROM SAID BREAKER CAM POINTS BEING CONNECTED TO ONE END OFA PRIMARY COIL OF EACH OF A PLURALITY OF TRANSFORMERS PREDETERMINED INNUMBER AND, (1) EACH OF SAID TRANSFORMERS'' SECONDARY COILS BEINGCONNECTED AT ONE END TO A GROUND AND AT THE OTHER END ACROSS A SPARKPLUG, (2) THE OTHER END OF EACH OF SAID TRANSFORMERS'' PRIMARY COILBEING CONNECTED TO THE DISTRIBUTOR CONTACT POINT ON ONE OF SAID CONTACTARMS DISTANT FROM SAID GROUNDED DISTRIBUTOR CONTACT POINT, (F)ELECTRICALLY CONDUCTIVE MEANS CONNECTED AT ONE END TO SAID FIRST END OFSAID SOURCE OF E.M.F. AND AT ITS OTHER END TO SAID GROUND THROUGH APLURALITY OF CONDENSERS INCREASING AND DECREASING, RESPECTIVELY, THETOTAL EFFECTIVE CONNECTED CAPACITY OF SAID CONDENSERS ON REMOVAL ANDADDITION OF CONNECTION BETWEEN SAID SOURCE OF E.M.F. AND ANY OF SAIDTRANSFORMERS.